You absolutely must know these because they're dead obvious and if you're just starting out with learning programming these are some of the first things you will/should learn, right after how computers store data.
For example, no python course for scientists is going to go on in-depth about the difference between big and small endian - it just doesn't matter when you're trying to make a simple graphical model, it's far too low level. Binary operators work and are useful in JavaScript, but how many 6 week frontend bootcamps are going to cover them?
What I'm getting to here is that I don't think you can just dismiss things like this because your coding background covered them - there's some pretty clear gaps in a lot of peoples' knowledge and educating them is likely only a good thing.
This sounds like a fast trip to the land of direct comparisons of floating point numbers.
Further info: https://randomascii.wordpress.com/2012/02/25/comparing-float...